Polyurethane node material for submarine oil-gas pipeline interface wet type thermal insulation, and preparation method thereof

A technology of oil and gas pipelines and polyurethane, which is applied in the field of polyurethane node materials and its preparation, can solve the problems of less than 100% closed cell rate, high water absorption rate of materials, and low thermal conductivity, and achieve fast post-curing, low mold temperature, The effect of short production cycles

Active Publication Date: 2015-03-11
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few patents published on the preparation of non-foamed polyurethane node materials for the on-site interface of submarine pipelines. Patent 201210258634.8 discloses a full-water open-cell rigid polyurethane foam for submarine pipeline joints. The thermal conductivity of polyurethane foam is low and the insulation effect is low. Good, but the closed cell rate cannot reach 100%, resulting in high water absorption and low compressive strength of the material, which is not suitable for the protection application of deep-sea wet-type thermal insulation pipeline joints

Method used

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  • Polyurethane node material for submarine oil-gas pipeline interface wet type thermal insulation, and preparation method thereof
  • Polyurethane node material for submarine oil-gas pipeline interface wet type thermal insulation, and preparation method thereof
  • Polyurethane node material for submarine oil-gas pipeline interface wet type thermal insulation, and preparation method thereof

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[0031] The following examples are used to further illustrate the preparation and application details of the present invention, and do not constitute a limitation to the spirit and scope of the present invention.

[0032] The experimental methods used in the following examples are conventional methods unless otherwise specified.

[0033] The materials and reagents used in the following examples can be obtained from commercial sources unless otherwise specified.

[0034] The raw materials used in the following examples are as follows:

[0035] Polypropylene glycol (PPG), hydroxyl value 50-60mgKOH / g, Shandong Bluestar Dongda Company;

[0036] Polytetrahydrofuran ether glycol (PTMEG), hydroxyl value 35-400mgKOH / g, German BASF company;

[0037] 1,4-Butanediol (BDO), Diethylene Glycol (DEG), Shanghai Lingfeng Chemical Co., Ltd.;

[0038] Catalyst CT-2X, Aladdin reagent company;

[0039] 4,4'-MDI, Huntsman Shanghai Polyurethane Co., Ltd.

[0040] NCO-B is trimerized modified MDI...

Embodiment 1

[0050]In a reactor with a vacuum and heating device, mix PPG (415.22 parts) and PTMEG (47.66 parts) uniformly and vacuum-dry at 95°C for 2.5h, and slowly cool down to 50°C, and the dried BDO (81.48 parts) and catalyst CT-2X (2.85 parts) were added, mixed and stirred for 15 minutes, and vacuum degassed to obtain component A.

[0051] Control the temperature of materials A and B at 30°C, add 455.63 parts of NCO-B1 to the above-mentioned component A, stir quickly and evenly degas, pour it into a mold with a mold temperature of 80°C, and obtain the submarine pipeline field interface of the present invention Use non-foamed polyurethane node material containing isocyanurate rings.

Embodiment 2

[0053] In a reactor equipped with a vacuum and heating device, mix PPG (415.22 parts) and PTMEG (47.21 parts) evenly and vacuum-dry at 95°C for 2.5 hours, and slowly cool down to 60°C, and the dried BDO (79.56 parts) and catalyst CT-2X (2.85 parts) were added, mixed and stirred for 15 minutes, and vacuum degassed to obtain component A.

[0054] Control the temperature of A and B materials at 30°C, add 458 parts of NCO-B2 to the above-mentioned component A, stir quickly and evenly degas, pour it into a mold with a mold temperature of 80°C, and obtain the submarine pipeline field interface of the present invention Use non-foamed polyurethane node material containing isocyanurate rings.

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Abstract

The present invention discloses a polyurethane node material for submarine oil-gas pipeline interface wet type thermal insulation. The polyurethane node material is prepared from a component A and a component B, wherein the component A comprises polyether polyol, a chain extender and a catalyst, the component B is trimerization modified isocyanate or a derivative thereof, a NCO mass content is 10-30% in the component B, and a mass ratio of the component A to the component B is 0.25-6:1. According to the present invention, the used catalyst does not contain mercury, and characteristics of environmental protection, long liquidity, and rapid curing at a late stage are provided; a production cycle is short, a mold temperature is low, and the material is suitable for marine on-site casting operations; and the product contains a trimer structure, and good high temperature resistance stability is provided.

Description

technical field [0001] The invention relates to a polyurethane node material for wet heat preservation of seabed oil and gas pipeline joints and a preparation method thereof. Background technique [0002] In the exploitation of marine energy, especially oil and natural gas, in order to prevent the formation of natural gas hydrates and petroleum waxes caused by low temperature in the sea from clogging pipelines and causing accidents, oil and gas transmission pipelines must adopt insulation protection layers with a certain thickness. The pipeline is used for transportation, and the protection, insulation and anti-corrosion layers of the main body of such pipelines are prefabricated by special equipment in the factory, and the quality of the protection layer and the insulation and anti-corrosion layer is relatively reliable. Therefore, in the process of offshore laying, the protection and filling of the interface is the key to ensure the safe operation of the submarine pipeline...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/79C08G18/66C08G18/48
Inventor 曹静沙勇张晓灵周巍伟张杰李新仲谢彬杨加栋李丽玮霍娜丽孔瑞林周长江蒋晓斌
Owner CHINA NAT OFFSHORE OIL CORP
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